387442877 has 2 divisors, whose sum is σ = 387442878. Its totient is φ = 387442876.

The previous prime is 387442859. The next prime is 387442931. The reversal of 387442877 is 778244783.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 381459961 + 5982916 = 19531^2 + 2446^2 .

It is a cyclic number.

It is not a de Polignac number, because 387442877 - 2⁸ = 387442621 is a prime.

It is a super-2 number, since 2×387442877² = 300223965876074258, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (387442817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 193721438 + 193721439.

It is an arithmetic number, because the mean of its divisors is an integer number (193721439).

Almost surely, 2^387442877 is an apocalyptic number.

It is an amenable number.

387442877 is a deficient number, since it is larger than the sum of its proper divisors (1).

387442877 is an equidigital number, since it uses as much as digits as its factorization.

387442877 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2107392, while the sum is 50.

The square root of 387442877 is about 19683.5687059029. The cubic root of 387442877 is about 729.0140420534.

The spelling of 387442877 in words is "three hundred eighty-seven million, four hundred forty-two thousand, eight hundred seventy-seven".